Metal planer



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Patented Apr. 27, 1943 METAL PLANER Application March 27, 1941, Serial No. 385,517

(Cl. Sil-49) 11 Claims.

This invention relates to metal planers of the type comprising a reciprocating table upon which the work to be machined is mounted. Straddling the table is a column structure upon which is mounted a rail. The rail structure is capable of upward or downward movement with respect, to the column. On the rail are mounted two saddles, which saddles are movable transversely of the machine along the rail. Mounted on each saddle is a slide which is movable upward or downward in a vertical direction. Each slide is provided with a tool holder.

In the planing of metal, the cut is taken when the table of the planer is moving in one direction and feeding movement of the tools is carried out either at the start of the cutting stroke or at the start of the return stroke of the table. It is desirable that each head be capable of feeding or traversing movement in all directions, individually or together with another head, and it is desirable that either head be capable of being controlled from substantially any point of the planer where the operator may be likely to stand.

It is an object of my invention to provide a planer in which a single stationary screw is provided in the rail and in which movement of the saddles with respect to the rail is accomplished by rotating nuts mounted in each of the ysaddles and engaging the stationary screw. Such nuts may be individually controlled to rotate in one direction or the other to give the desired movement to the saddles.

It is further such an object of my invention to place the stationary screw low down on the rail and at the same time to provide a gib on top of the lower guide rail to form a narrow guide construction. Thus, while in a conventional planer the bearing surfaces between the rail and saddle are found one at the top of the rail and one at the bottom of the rail with -two screws one close to the top bearing surface and one close to the bottom surface of the rail, in my novel construction, complete bearing surfaces are adjacent the bottom of the rail and the lead screw is closely adjacent `to the bearing surfaces. By this construction I obtain a number of advantages. Both saddle nuts will be as close to the tool point as possible, the screw being close to the narrow guide insures easy movement of the head, and both the narrow guide and the screw are as close to the tool point as possible. Furthermore, by using a stationary screw I am enabled to pre-load it in tension whereby lost motion due to stretching is eliminated. These advantages cannot be obtained in a planer of conventional construction.

t is a further object of my invention to provide for simple removal and replacement of the saddle nuts without necessitating the removal of either the saddle or the screw from the rail and similarly, to provide for the possibility of removing end play due to wear without having to remove the screw or the saddle from the rail.

It is another object of my invention to provide an individual multiple spline drive shaft for each head, which shaft serves to drive either the revolving saddle nut or the down feed screw. It is another object of my invention to provide independent reversal for each drive shaft so that it is possible to feed both heads in the same or opposite directions simultaneously. It is also an objectof my invention to provide means for causing the feed to take place either on a return or on a cut stroke.

It is a further object of my invention to provide for each head an individual revolving control rod to operate the cams which shift between down and cross feed at the head and also cams which shift the feed and traverse clutches at the end of the rail. Each of these rods has seven angular positions providing for manual operation, feeding movement and traversing movement to the slide, manual operation, feeding movement and traversing movement to lthe saddle and a neutral position.

It is another object of my invention to provide for control from a number of points by providing handles for the control rods at each end of the rail and by providing a slidably mounted handle adjacent each saddle so that therheads may be controlled from either end of the rail or from either saddle. It is, therefore, an important object of my invention -to provide for dual manual adjustment and complete individual feed and traverse control at the saddles by a total of ve shaft members in the rail. These shaft members include one fixed screw, two drive shafts and two control-rods.

It is'another object of my invention to provide means whereby either the slide or saddle of one head may be traversed or manually adjusted while either the other slide or saddle of the other head is feeding a regular cut by power feed.

These and numerous other objects of my invention which will be pointed out in more detail hereinafter or which will be apparent to one skilled in the art upon reading these specifications, I accomplish by that certain construction and arrangement of parts of whichv I shall now describe an exemplary embodiment. Reference is made to the drawings forming a part hereof and in which:

Figure 1 is a fragmentary perspective view of a planer according to my invention.

Figure 2 is a front elevation of the pendant switch.

Figure 3 is a sectional view taken on the line 3 3 of Figure 9.

Figure 4 is a side elevation of the main gear box showing the control elements.

Figure 5 is a detailed side elevation of the index plate for the left head control lever.

Figure 6 is a similar view of the index plate for the right head control lever.

Figure 7 is a side elevation of the gear box of Figure 4, but with the major portion of the casing broken away and showing the various shafts in section. Y

Figure 8 is a gear train development taken along the irregular line 8 8 of Figure 7 as is shown partly in elevation and partly in section with parts broken away to clarify the arrangement. This train and the control levers shown control the left head.

A similar view taken along the irregular line B Sa of Figure 7 would have exactly the same appearance as Figure 8 with the exception that the control lever would occupy the broken lines seen in Figure 8 and such a figure would illustrate the control for the right hand head. In view of the fact that such a view would be in all other respects identical to Figure 8 and in order to avoid duplication of figures, only the one figure has been used.

Figure 9 is a detailed sectional view on an enlarged scale taken on the line 9 9 of Figure 7 or Figure 8.

A sectional view along the line 9a/ 9a of Figure 7 would look exactly like Figure 9.

Figure 9a is a sectional view of a crank for manual operation of the drive shaft.

Figure 10 is a development of the barrel cams and clutch shifter shown on the lower shaft of Figure 8. These cams control the left head and the development of the corresponding cams for controlling the right head is identical with Figure 10.

Figure 11 is a sectional view on an enlarged scale taken on the line II-II of Figure 7 or 8. ,Figure 12 is a sectional view taken on the line I2 I2 of Figure 7, showing the feed reversing A gearsgwhich in this gure are shown in a neutral position.

Figure 13 is a sectional view on an enlarged scale takenon the line I3 I3 of Figure 8 show- Ying the ratchet mechanism by means of which the feed may be caused to occur on the return stroke or on the out stroke of the table.

Figure 14 is a cross sectional view taken on the line I4-I4 of Figure 13.

Figure l5 is a detailed side elevation of one of the dogs utilized in the ratchet of Figure 14.

Figure 16 is a similar View of another of the dogs taken from the ratchet shown in Figure 14.

Figure -17 is a detailed cross sectional view on a greatly enlarged scale through the left hand head and saddle on the line I1 II of Figure 1.

Figure 18 is a perspective View 'of the rear side of the left ,head detached from the machine but showing fragments of the associated control shafts and the cross 'feed screw.

,Figure 19 is a sectional view taken along the line llil-Iii of Figure 8.

Figure 20 is a gear train development along y i the irregular Vline 20-20 of Figure 17.

Figure 21 is a development of the cams and clutch shifter of Figure 20.

Figure 22 is a view similar to Figure 20 but taken through the right head.

Figure 23 is a development of the cams and clutch shifter of Figure 22.

Figure 24 is a front elevation of the rail showing one of the saddles with the slide removed therefrom, the rail being broken away so that the other saddle and one column is not visible.

Figure 25 is a cross sectional View on an enlarged scale taken on the line 25 25 of Figure 24.

Figure 26 is a fragmentary cross sectional view taken on the line 26-26 of Figure 25.

Figure 27 is a detailed cross sectional view on an enlarged scale taken on the line 21-21 of Figure, 24.

Figure 28 is a cross sectional view taken on the line 28-28 of Figure 27.

GENERAL DESCRIPTION Referring particularly to Figure 1, I have shown in perspective a planer according to my invention. The planer comprises a bed indicated at I5 upon which is reciprocally mounted the table II. On either side of the bed are provided the columns I2 which are connected by the overhead bridge I3. 'Ihe table is driven back and forth through a conventional arrangement by means of the shaft I4 which is driven by some suitable source of power not shown. Slidably mounted on the columns I2 is the cross rail I5; and a supplemental saddle I6 may be mounted to ride on one or the other or both columns. -The cross rail I5 carries the saddles I'I and I8, saddle I'I being designated as the left hand saddle and the saddle I8 as the right hand saddle. The saddles are, of course, movable longitudinally of the rail, that is transversely of the table. The saddle carries the slides indicated respectively at I9 and 20. The saddle I6 may carry a slide 2 I. The slides I9 and 2B are movable transversely of the rail I5, i. e., in a vertical direction and the slide 2| is movable transversely of the column, that is, in a horizontal direction.

Driven from the gearing, which drives the table I i in a conventional manner, through a gear box 22 is a vertical spline shaft 23 which shaft will, of course, rotate first in one direction and then in a reverse direction in accordance with movement of the table I I.

Mounted on the bridge I3 is an auxiliary motor 24 which drives through a gear box 25, a shaft 26 which in turn drives the vertical spline shaft 21 through a gear box 28. The motor 24 also drives through the gear box 25, a shaft 29 which through bevel gears indicated generally at 3U drives the vertical screws 3|. The screws 3l are engaged by nuts fixed to the rail I5 (and which are not shown in the drawings), and serve to elevate or lower the cross rail as a whole depending upon the direction which the motor 24 turns. The motor 24 is controlled by means of the pendant switch 32 which, as is well known in the art, is suspended from pipe fittings indicated generally at 33, and which can be pivoted about the elbow 34 so as to be accessible from any part of the machine. 'Ihe switch 32 is also counterweighted so that it can be lowered or raised.

A clamping mechanism, not shown in detail, for clamping the rail to the column is provided. This is operated by placing the crank on the shaft 200, Figure l. Rotation ciockwise clamps the rail to the column, and rotation counterclockwise unclamps it. Connection is made between the clamping mechanism and a clutch in box so that when the rail is completely unclamped the clutch engages, causing connection between the motor 24 and the shaft 2 9. Actuation of the pendant switch causes the motor to` raise or lower the rail. Reclamping the rail disengages the clutch so that it is. impossible toraise or lower the rail when clamped.

The pendant switch 32 may also be arranged to control an electric clutch arrangement in the gear box 25 whereby the motor 25 can be caused to drive either shaft 26 or the shaft 29.

In the body of this specification, reference will be had to feeding movement and traversing movement. As used in this specification, the phrase feeding movement" will be used to refer to the intermittent movement given either to the saddle or the slide in one direction or the other in connection with either the cut or the return stroke of the table. The words traversing movement will be used to describe a continuous positioning movement of either of the saddles or the slide in one direction or the other which may be imparted to such saddle or slide wholly individually of the movement of the table. It will thus be clear from what has gone before that feeding movement is produced by rotation of the vertical shaft 23 while traversing movement is produced by the vertical shaft 21.

The mechanism for driving the table as well as the dog switching arrangements in connection therewith form no part of the present invention and will not be described herein. Likewise, the construction of the saddle I6 and slide 2| will not be described since it may be the same as the construction of the saddles I1, I8 and slides I9, 26; or it may be of conventional design if desired.

The traversing mechanism As was pointed out, the traversing mechanism is produced by the motor 24 through the gear box 25, the shaft 26, a gear box 28 and the vertical spline shaft 21. Referring now more particularly to Figures '7 and 8, I will describe the traverse train of gearing. The spline shaft 21 may be seen in Figure 8 and it will be observed that the shaft 21 is engaged by an internally splined bevel gear 35. The bevel gear engages and drives a bevel gear 36 which is fixed on the shaft v 31. Referring now more particularly to Figure '1, the drive shaft for the left head is shown at 3B and the drive shaft for the right head is shown at 39. Motion is transmitted from:I the shaft 31 to the shafts 38 and 39 through two simple trains of gearing in which the various gears of the train are all freely rotatable on the shafts on which they are mounted. Thus, motion is transmitted from the shaft 31 to the shaft 38 by means of the gear 40 which is, of course, fixed on the shaft 31, the gear 4I, the gear 42, the gear 43 to the gear 44 which is slidably keyed on sleeve 45 which is freely rotatable on the shaft 38.

Motion is transmitted from the shaft 31 to the shaft 39 through the gear 46, the gear 4l, which have been mentioned before. and thence 'to a gear 46 and a gear 41 to the gear 48 which is slidably keyed on a sleeve 49 which is freely rotatable on the drive shaft 39.

As will be clear by reference to Figure Qthe gear 44 which is slidably keyed to the sleeve 45 has integral therewith the clutch teeth 5i). The

clutch teeth 50 are arranged to mesh with the clutchv teeth 5l of the clutch member 52 whichis slidably splined on a splined portion 53 ofthe shaft 38, so that when the teeth 50 and 5l are in engagement the traversing movement is' transmitted to the shaft 38. I

The clutch member 52 is shifted by means of a forked member 54 which is fixed to the clutch shifter 55. The clutch shifter 55 is provided with oppositely facing angular cam elements designated specifically at 56 and 51 respectively. Referring more particularly to Figure 11, it will be. clear that the clutch shifter 55 is freely slidable on the control shaft 53. Fixed on the end of the control shaft 58 is an operating handle 59. As will be clear from a study of Figures 4, 5, 6 and 10 the control lever 59 may shift the control shaft 58 to any one of seven angular positions.

saddle.

In the central position in which the cam arrangement is shown developed in Figure l0 the clutch element 52 will be in a neutral position, While if lthe handle 59 is moved upward one step, the

clutch shifter 55 will be moved toward the right as seen in Figure 8 bringing the clutch teeth 5! and 5| into engagement to impart traversing movement to the left hand head. Likewise, if the control handle 59 is moved downward one step from the neutral position, the clutch element 52 will be shifted toward the right as seen in Figure 8 to impart traversing movement to the shaft 38. As will be described in detail hereinafter, the upward movement provides traversing movement for the slide while the downward movement provides traversing movement for the The construction described above is identical in connection with the drive shaft 39 for the right hand head insofar as the clutch and the clutch shifting cams and control handle are concerned. In Figure 4 the control handle for the right hand head is indicated at 66. The control shaft for the right hand head is indicated at 6l. The reversal of direction of traversing movement is accomplished by reversing the direction of rotation of the motor 24.

Feed mechanism As was described above the feed movement takes place in one direction or the other in accordance with movement of the table. The movement is transmitted to the main gear box by the vertical spline shaft 23. Referring again to Figure 8, the spline shaft 23 is engaged by'an internally splined bevel gear 62. The bevel gear 62 meshes with a bevel gear 63 which is fixed on the shaft 64. The gear 69 is mounted on the shaft 64 and connected to the driven member of the clutch 66. The shaft 64 is free to rotate in the gear 69 when the clutch is deenergized. When the clutch is energized, the shaft 54, the clutch 66 and the gear 69 rotate as a unit. The electric clutch, per se, forms no part of the present invention and will not be described in detail, save to say that the duration of engagement of the clutch 66 may be controlled by means of a timing device such as is described and claimed in my copending application Serial No. 206,799, filed May 9, 1938, which issued under date of February 25, 1941, as U. S. Patent No. 2,233,095. The time interval may be adjusted by the mechanism indicated generally at 6? which is also described in said application as will be clear from a consideration of Figure l. A mechanism similar to the device 61 may be provided for the saddle I6 and slide 2l as indicated at 68.

Rotation of the gear 69 is transmitted to tee drive shafts 33 and 39 through two trains of gearing in each of which is incorporated a reversing arrangement, and a ratchet mechanism is provided common to both trains. The purpose of the ratchet mechanism is, of course, to

impart movement to the drive shaft only when l the table is moving in one direction. Means are provided in connection with a ratchet for making it operative in either direction whereby the feeding movement may take place either upon the cutting stroke or the return stroke of the table. The purpose of the reversing gears is to permit movement of the saddles or slides in one direction or the other. The gear 69 drives a gear 10 which is fixed on the shaft 1|. On the end of the shaft 1| is carried a gear 12 which drives the timing mechanism contained in the casing 61. Slidable on the hub 19a of the gear 15 is a shell 13. The shell 13 is shiftable by means of a fork 14 engaging a groove 15 therein, which fork 14 is actuated through a suitable linkage by means ofthe control member 15a. In the particular embodiment shown the arrangement is such that the shifting of the fork is accomplished by rotating the member 15a through 180. Referring now in more detail to Figure 13, the ratchet comprises a gear 15 having internal ratchet teeth 11. The shaft 1I in the region of the ratchet has the cross section shown in Figure 14 and is provided with four pivotal pawls 18 which pawls are outwardly urged by means of spring devices 19. As shown in Figure 14, it will be observed that twoof the pawls are out of engagement with the ratchet teeth and as shown in that figure movement will be transmitted when the shaft 1| is rotated in a counterclockwise direction.

When the shell 13 is shifted toward the right as in Figure 8 or 13 the inwardly projecting ilange 8D engages with cam elements 8| on those pawls 18 which are in engagement with the ratchet teeth thereby depressing said pawls so that they are no longer in engagement with the ratchet teeth. At the same time the flange 80 rides down off the cams 8'2 of the pawls 18, which in Figure 14 are held out of engagement with the teeth, whereupon the springs 19 will urge said pawls outwardly to engage the ratchet teeth. Thereby motion will be transmitted when the shaft 1| is rotating in a clockwise direction. The gear 19 meshes with the gear 83 which is iixed on the shaft 84 which is splined over part of its length as at 85. A reversing gear 86 is slidable on the spline shaft 35 and is arranged to mesh in one position with a gear 81 directly as shown in Figure 8 or when shifted to be withdrawn from engagement with the gear 81.

Referring to Figure l2, it will be observed that the gear 85 has been shifted to a position out of engagement with the gear 81. Concurrently the gear 88 will be shifted toward engagement with the gear 81 by action of the shifting member which is pivotally mounted between the two gears and carries rollers or studs engaging grooves in the hubs of the gears, the gear 88 being slidably mounted upon a spline shaft 89 upon which is iixedly mounted the gear 83a which has the same number of teeth and is in driving relation with the gear B3. The shaft 89 is being driven at the same speed but in the opposite direction from the shaft 84. 1t will, thus, be clear that upon shifting of the gear 85 out of engagement with the gear 81 and by shifting the gear 489 into engagement with the gear 81, the direction of rotation of gear 81 will be reversed. The gear 81 drives the gear 90 which has integral with it .the clutch teeth 9| which are arranged to be brought into clutching arrangement with the clutch teeth 92 on the clutch element 52. The manner in which the clutch element 52 is shifted has `been described above in connection with the traversing mechanism. Now, it will be observed that if the control handle 59 is moved upwardly three steps from the neutral position, i. e., to its uppermost position, the clutch will be thrown to the left to cause'engagement of the clutch teeth 9| and 92 to transmit feeding movement to a shaft 38. Likewise, if the control handle 59 is moved downwardly three steps from its neutral position, i. e., to its lowermost position, the clutch 52 will be shifted to the left and again cause engagement of the teeth 9| and 92. v

It may be observed that means are provided whereby the gears 44 and 99 are mademore or less engaging Vupon shifting of the clutch shifter, in that, spring cushioning means indicated generally at 93 are provided in connection therewith. Thus, if teeth on the clutch 5| or 92 happen to be opposite teeth on a clutch 5B or 9| they will rise upon movement of the'clutch 52 in one direction or the other. The right gear unit 99 or 44 may yield outwardly and will spring into engagement when a tooth on one element comes in operative relationship with a receiver on the other. The description thus far has related to the train of gearing from the shaft 64 to the shaft 38. The train to the shaft 39 is identical in all respects to the one just described and will, therefore, not be described in detail.

It will be observed that there is provided fixed to the control shaft 59, a gear 94 which meshes with a gear 95 on the shaft 38. The gear 95 is rotatable on a sleeve 95 which sleeve 96 is splined on the shaft 38. Integral with the gear 95 is a cam element 91 which is in operative relationship with a cam element 98 which is slidable on the sleeve 96. The cam 99 is provided with teeth 99 arranged to mesh with internal teeth |00 on a ring IDI which is fixed to the casing. Thus, the cam 98 is slidable on the sleeve 95 but is not rotatable.

The end of the sleeve 95 is provided with clutch teeth |92 arranged to mesh with clutch teeth |03 on the crank member |94. The member |94 is provided with a iiange |95 which extends relatively a suiiicient amount to bear against the end of the member 99. The cam elements 91 and 93 are so arranged that when the control handle 59 is moved upward or downward two steps from the neutral position and when the handle 59 is in the hand position, the crank |94 may be slipped over the end of the shaft 38 and the teeth |93 may Ibe engaged with the teeth |92, whereby the shaft 33 may be manually rotated.

As soon as the control handle 59 is shifted to a position other than the three positions mentioned, the gearing 94, 95 rotates the cam element 91 causing the cam element 93 to be moved to the right in Figures 8 and 9, whereby the end of the member 98 bearing against the flange |05 forces the crank H35 outwardly and prevents engagement of the teeth |92 and |93.

Saddle and slide control and drive mechanisms As has been described above, the movement of the saddle I1 and slide I9 is traversed by movement of the drive shaft 38 and movement of the saddle |8 and the slide 20wis traversed by rotation of the drive shaft 39. I will now describe the mechanism whereby the traversed movement is applied selectively to the slide or the saddle. Referring more particularly to Figures 17, 18, 20 and 21, the spline shaft 38 passes through two brackets |06 and I 0'! as do the shaft 30 and the control shafts 58 and 6|. Splined on the shaft 38 between the brackets |00 and |07 is the clutch element |08. On either side of the clutch element |08 and inside the brackets |06 and |01 are the gears |09 and H0 carrying respectively the clutch elements il and ||2. The gear meshes with an idler gear ||3 which is freely rotatable on the control shaft 8| and which in turn meshes with a composite gear ii which is freely rotatable on the drive shaft 30. The gear H4 has a bearing in the bracket |08 and carries at its other end outside of the `bracket a bevel gear ||5 which .bevel gear meshes with a bevel gear H5. The gear IE6 has a sleeve ||1 integral therewith which has a bearing in the saddle Keyed Within the sleeve is the shaft ||8 which has on its outer end the bevel gear ||9. The bevel gear I0 meshes with a bevel gear which is provided with a key |2| arranged to ride in a key-way |22 which runs the entire length of the screw |23. The screw |23 has a bearing in the slide as at |28 and passes through fixed nuts at |25 and |20 so that the gear |20, through the key construction, rotates the screw |23 turning the same and causing it, by the bridge through the fixed nuts, to move the slide I0 upward or downward depending upon its direction of rotation. The key construction at |2| and |22 permits longitudinal movement of g the screw |23 in relation to the gear |20. It will now be clear that when the clutch element |08 is shifted to the left as seen in Figure 18 or to the right as seen in Figure 20 (Figure 20 being on the line 20-20 of Figure 17 and thus, in effect, showing the opposite side of the gearing of Figure 18), motion will be imparted to drive the slide up or down.

Returning to Figure 18, it will be observed that the gear ||0 meshes with a gear |21 which is freely rotatable on the control shaft 6| and which meshes in turn with a gear |28 which is freely rotatable on the spline shaft 39. The gea:` |28 is arranged to mesh with a gear |20 which is keyed to the sleeve which has a :bearing in an extension |00a of the bracket |08. 'I'he gear |29 is held in position on the sleeve by means of lock nuts |35. The sleeve |30 is enlarged at |30a to provide a housing for the axially split nut |32, |33 which split nut is held in place by the cap |34 which is threaded onto the end of the sleeve extension |30a. One of the halves of the split nut, as for example the part |32, is keyed to the sleeve as at |35.

It will now be clear that when the `clutch element |00 is shifted to the left in Figure 1.8, feeding movement or traversing movement depending upon the arrangement of the gears in the main gear box is imparted to the slide l0 and that if the clutch |08 is moved to the right in Figure 18 it will impart feeding or traversing movement to the saddle The shifting of the clutch `|08 is accomplished by means of the clutch shifting cam indicated generally at |36 in Figure 18, a development of which is shown in Figure 2l. As will be clear, the arrangement is such that when the `control handle 50 is moved upwardly the clutch element |08 will be shifted to the left in Figure 18 or to the right in Figure 20 to transmit motion to the slide and when the handle 50 is moved downwardly the clutch element |08 will be shifted to the right in Figure 18 or to the left in Figure 20 to impart motion to the saddle.

The arrangement for `controlling the right hand head is very similar to the left hand head except that the clutch shifting action is accom,- plished from the control shaft 0| and the traversing movement is traversed from the spline shaft 38. The spline shaft 39 carries a clutch and a pair of gears corresponding to the elements |08, |00 and H0 and the lcontrol shaft 6| carries a clutch shifting arrangement similar to Ithe elements generally indicated at |33. .The

only diierence is that the gears corresponding to the gears and ||2 directly drive the bevel gear corresponding to the bevel gear l5 and the gear corresponding to the gear |20 as will be clear from a consideration of Figure 22, otherwise, the mechanism for the right hand head needs no fu.'- ther discussion. j

It will be clear that the spring arrangement described in connection with Figure 9 andL indicated at 93 is provided in connection with. the gears and ||2 for both heads.

Since the right head is reversed with respect to the left head, it will be clear that the clutch shifting arrangement |35 vfor the righthand head will be arranged to operate in a reverse direction to that described in connection with the left hand head.

In Figure 20 I have shown the gear |28 keyed to a sleeve |2811 which is freely rotatable on the shaft 30. Fixed to the outer endof the sleeve |2811 is a micrometer collar A30a which is in a `convenient position for the planer operator. Since the sleeve |280 vrotates only when the saddle is moving, it will be clear tha-t the :collar may be calibrated to indicate vin appropriate units the movement of the saddle. A micrometer collar may also be provided Vfor the slides as shown at |24a in Figure 17.

Referring to Figure 24, I have shown at ,|410 a pair of supplementary control handles having the same functions as the control handles 58 and 4|30, respectively, and which are slidable on the control shafts 6| and 38, thus providing means for actuating the control shafts not only from both ends of rail, but also from a position adjacent each head.

At |4| I have indicated supplementaryy crank elements whose function is similar to that of the crank |04 so that hand feeding motion may be imparted to the drive shafts 38 and 30 from a position adjacent the heads. Since by virtue of their location it is impossible to have a complete turn for such cranks, I have incorporated therein a ratchet arrangement best shown in Figure 2'7. A ratchet element |122 is splined on the spline shaft 38 -or30 and is arranged to be lengaged by pawl |43 which is spring urged out of eng-agement with the ratchet |42. When -it is desired .to rotate the shaft 38 or 3.9, the operator grasps the handle Idd-pressing on the button M5 with his thumb, thus, the pawl |43 is in engagement with the ratchet |82. The pawl |43 is provided with two axial grooves |0219 apart. The ratchet hub |l2a is provided with a hole -|43a in which la ball |4331) is inwardly urged by -a spring |030 which is held in place by the screw #i3d Thus when it is desired to reverse the operative direction of the ratchet it is only necessary to rotate the pawl |03 through 180 so that the ball |4319 engages the other groove |421).

As was described above, by virtue of the fact that a fixed screw is employed it is possible to initially load it in tension to prevent lost motion due to stretch. In Figure 24 I have shown the left hand end of the screw |50 as being threaded as at and having a neck portion |52. A shouldered nut |53 is received on the threaded portion 15|, and may be tightened by a Spanner wrench engaging in the holes |54 therein. The other end of the screw is similarly fastened.

The narrow guide feature which was discussed above is best seen by reference to Figures 1, 1'7 and 24. It will be observed that the saddle has a dove-tail bearing with the rail at |55 and with a gib |55 relatively close to the dove-tail bearing |55, the saddle is held in position on the rail by a plate |51 bolted to the saddle by means of bolts |58 which lap over a portion |59 of the rail. A study of Figure 1'7 particularly, will clearly demonstrate how the screw |50 is close to the tool point and close to the guide whereby easy movement of the saddle is assured.

It will be clear that numerous modifications may be made in the above description without departing from the spirit thereof, and therefore I do not wish to be restricted thereto except as set forth in the following claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is:

1. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a pair of saddles mounted on said cross rail for horizontal movement along said cross rail, a stationary screw mounted in the lower portion of said rail, a rotatable nut mounted in each of said saddles, a drive shaft for each of said saddles mounted in said rail, and a control shaft for each of said saddles mounted in said rail, means including clutches for transmitting driving motion from said drive shafts to said rotatable nuts, and cam means actuable by said control Shafts for actuating said clutches.

2. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a pair of saddles mounted on said cross rail for. horizontal movement along said Across rail, a stationary screw mounted in the lower portion of said rail, narrow guide means for each of said saddles, said guide means being located relatively close to said screw, a rotatable nut mounted in each of said saddles, a drive shaft for each of said saddles, and a control shaft for each of said saddles, all mounted in said rail, means including a clutch in each of said saddles fortransinitting driving motion from one of said drive shafts to the rotatable nut in one of said saddles, and means respectively operable by each of said control shafts for actuating one of said clutches.

3. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a pair of saddles mounted on said cross rail for horizontal movement along said cross rail, a stationary screw mounted in the lower portion of said rail, narrow guide means for each of said saddles, said guide means being located relatively close to said screw, a rotatable nut mounted in each of said saddles, a drive shaft for each of said saddles, and a control shaft for each of said saddles, all mounted in said rail, means including a clutch in each of said saddles for transmitting driving motion from one of said drive shafts to the rotatable nut in one of said saddles, and means respectively operable by each of said control shafts for actuating one of said clutches, and means for operating said control shafts, said means com# prising manual levers non-rotatably engaging said control shafts, and slidable therealongto various positions of ready access. 1

4. In a planer having a column, a cross rail mounted for movement in a vertical directionon said column, a pair of saddles mounted on said cross rail for horizontal movement along said cross rail, a stationary screw mounted in the lower portion of said rail, narrow guide means for each of said saddles, said guide means being located relatively close to Said screw, a rotatable nut mounted in each of said saddles, a drive shaft for each of said saddles, and a control shaft for each of said saddles, all mounted in said rail, means including a clutch in each' of said saddles for transmitting driving motion from one of said drive shafts to the rotatable nut in one of said saddles, and means respectively operable by each of said control shafts for actuating one of said clutches, and means for operating said control shafts, said means comprising manual levers non-rotatably engaging said control shafts, and slidable therealong to various positions of ready access, and means for manually rotating said drive shafts for adjustment, said means comprising levers having a releasable ratchet engagement with said drive shafts, and slidable therealong to positions of ready access.

5. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a saddle slidably mounted on narrow guide means in the lower portion of said cross rail for horizontal movement along said cross rail, said saddle carrying a slide movable vertically in relation thereto; a stationaryA screw mounted in the lower portion of said rail relative-A ly close to said narrow guide means, a rotatable nut mounted in said saddle, a gear train for producing movement of said slide, a drive shaft in said rail, and a control shaft in said rail, means including a clutch for connecting said drive shaft selectively with said rotatable nut or said gear train, and means operable by said control shaft for actuating said clutch to complete the driving connection either to said saddle or to said slide.

6. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a pair of saddles mounted on said cross rail for horizontal movement therealong, each of said saddles carrying a slide movable vertically in relation thereto; a pair of drive shafts and a pair of control shafts in said cross rail, a gear tra-in in each of said saddles for producing movement of the respective slides, a rotating nut in each of said saddles, a stationary screw in the lower portion of said rail engaged by said nuts, a clutch in each of said saddles, each of said clutches in one position connecting a respective drive shaft and rotating nut on saidscrew to produce movement of the respective saddle, and in the other position producing connection of said respective drive shaft with the respective gear train to produce movement of the respective slide, and means operable by the respective control shaft for operating the respective clutch, said saddles having narrow guide means relatively close to said screw.

7. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a pair of saddles mounted on said cross rail for horizontal movement therealong, each of said saddles carrying a slide movable ver. tically in relation thereto; a pair of drive shafts and a pair of control shafts in said'cross rail, a

gear train in each of said saddles for producing movement of the respective slides, a rotating nut in each of said saddles, a stationary screw in the lower portion of said rail engaged by said nuts, a clutch in each of said saddles, each of said clutches in one position connecting a respective drive shaft and rotating nut on said screw to produce movement of the respective saddle, and in the other position producing connection of said respective drive shaft with the respective gear train to produce movement of the respective slide, and means operable by the respective control shaft for operating the respective clutch, said saddles having narrow guide means relatively close to said screw, and means in connection with said drive shafts to apply feed and traverse drives thereto, said means comprising a train of gearing, clutch means for each of said drive shafts, and manual operating means for said clutch means, said manual operating means also having an operating connection with said control shafts.

8. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a pair of saddles mounted on said cross rail for horizontal movement therealong,

each of said saddles carrying a slide movable vertically in relation thereto; a pair of drive shafts and a pair of control shafts in said cross rail, a gear train in each of said saddles for producing movement of the respective slides, a rotating nut in each of said saddles, a stationary screw in the lower portion of said rail engaged by said nuts, a clutch in each of said saddles, each of said clutches in one position connecting a respective drive shaft and rotating nut on said screw to produce movement of the respective saddle, and in the other position producing connection of said respective drive shaft with the respective gear train to produce movement of the respective slide, and means operable by the respective control shaft for operating the respective clutch, said saddles having narrow guide means relatively close to said screw, and means in connection with said drive shafts to apply feed and traverse drives thereto, said means comprising a train of gearing, clutch means for each of said drive shafts, and manual operating means for said clutch means, said manual operating means also having an operating connection with said control shafts, and supplemental means for operating said control shafts, said means comprising manual levers non-rotatably engaging said control shafts, and slidable ltherealong to various positions of ready access.

9. In a planer having a column, a cross rail mounted for movement in a vertical direction on said column, a pair of saddles mounted on said cross rail for horizontal movement therealong, each of said saddles carrying a slide movable vertically in relation thereto; a pair of drive shafts and a pair of control shafts in said cross rail, a gear train in each of said saddles for producing movement of the respective slides, a rotating nut in each of said saddles, a stationary screw in the lower portion of said rail engaged by said nuts, a clutch in each of said saddles, each of said clutches in one position connecting a respective drive shaft and rotating nut on said screw to produce movement of the respective saddle, and in the other position producing connection of said respective drive shaft with the respective gear train to produce movement of the respective slide, and means operable by the respective control shaft for operating the respective clutch, said saddles havingnarrow guide means relatively close to said screw, and means in connection with said drive shafts to apply feed and traverse drives thereto, said means comprising a train of gearing, clutch means for each of said drive shafts, and manual operating means for said clutch means, said manual operating means also having an operating connection with said control shafts, and supplemental means for operating said control shafts, said means` comprising manuallevers non-rotatably engaging said control shafts, and slidable therealong to various positions ofgready access, and means for manually rotating said drive shafts for adjustment, said meansv comprising levers having a releasable ratchet engagement with said drive shafts, and slidable therealong to positions of ready access. f

10. In combination with a stationary lead screw, a rotatable nut comprising a sleeve about said lead screw, said sleeve having a recessi a pair of internally threaded nut elements arranged to engage said lead screw and to be seated in said recess, and cap means arranged to be fastened to said sleeve to retain said nut elements in operative relationship with said sleeve, and means for preventing rotation of said sleeve with respect to said nut elements.

11. In a planer having a cross rail, and a saddle mounted on said cross rail, a stationary lead screw in said cross rail, means for producing movement of said saddle with respect to said rail, including a rotatable nut, said nut comprising a sleeve about said lead screw, said sleeve having a recess, a pair of internally threaded nut elements arranged to engage said lead screw and ,to be seated in said recess, and cap means arranged to be fastened to said sleeve to retain said nut elements in operative relationship with said sleeve, and means for preventing rotation of said sleeve with respect to said nut elements.

JESSE DAUGHERTY. 

